import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Interfaces from '../components/interface/Interfaces.vue'

Vue.use(VueRouter)

const routes = []

const router = new VueRouter({
  routes:[
  {path:'/',redirect:'/login'},
  {path:'/login', component: Login},
  {path:'/home', component: Home,redirect :'/welcome',children:[
    {
      path:'/welcome',
      component:Welcome},
      {
        path:'/users',
      component:Users,
      },
      {
        path:'/interfaces',
        component:Interfaces
      }
      ]
  }
  ]
})
//挂载路由导航守卫
router.beforeEach((to,from,next)=>{
  ///to将要访问的路径
  //from代表从哪个路径跳转而来
  //next是一个函数，表示放行
  if(to.path=='/login') return next();
  const tokenStr=window.sessionStorage.getItem('token');
  if(!tokenStr) return next('/login');
  next();
})
export default router
